Molder&#39;s flask



Nov. 25 1924 1,517,020

J. A. SHANAFELT MOLDER S FLASK Filed June 5, 1923 Q/NI/EAITO Patented Nov. 25, 1924.

UNITED STATES PATENT OFFICE.

JOHN A. SHANAFEL'I', OF CANTON, OHIO, ASSIGNOR TO THE SHANAFELT MANUFAC- TUBING COMPANY, OF CANTON,

OHIO, A CORPORATION OF OHIO.

MOLDERS FLASK.

Application filed June 5,

prise two companion, or upper and lower sections and the object of my invention is to provide an exceedingly simple, durable and serviceable construction which may be economically manufactured and which may be adaptable to universal serviceability in metal founding practice.

A. further object of my invention is to provide a steel or pressed metal flask construction which may have the characteristics of lightness and durability and which may effectively retain molding sand when once the mold is formed.

In the drawings, Fig. 1 is a perspective view of one section of a snap flask embodying my invention; Fig. 2 is an enlarged transverse cross sectional View of the element shown in Ilig. 1.

In my flask construction, each element is adaptable for use either as a cope or nowel or drag and I, therefore, have shown but one element as a cope section, which, if reversed, would represent the corresponding coacting member or element commonly known as the nowel or drag section of the mold, and to properly but briefly disclose my invention, but one element will be described.

As shown in the drawings, my flask construction comprises a pair of U-shaped pressed metal members 5 and 6, preferably formed of steel channel sections having the webs thereof corrugated and ribbed adjacent top and bottom sand retaining flanges which extend inwardly, as will be hereinafter described.

The U-shaped members 5 and 6 may have the leg portions thereof placed with the ends in abutting relation whereby they may be oined by suitable gusset plates 7, and the U legs together with the gusset plates thus form the end walls 9 and 10 of the flask section. The abutting ends of the leg portions 1923. Serial No. 643,485. 7

of the U-shaped members may, if desired, be welded together, but I flnd that a very rigid construction may be obtained in using the gusset plates referred to, by passing rivet members 11 directly through the abutting end portions of the U members whereby flask pin brackets 12 disposed on opposite ends of the flask section may be rigidly secured to the flask with a plate portion 12 thereof in overlapping relation to the abutting ends of the U-shaped members.

As shown in Fig. 2, the wall section may comprise a steel plate, having a web or flat zone portion 14: intermediate a top corru gation or rib 1 5, and a bottom corrugation or rib 16, which is formed in the plate to extend outwardly and merge into sand retaining flange portions 17 and 18. The sand retainingflanges extend inwardly from the rib portions a sufficient distance to project beyond the inner surface of the flat zone portion of the flask wall. The forming of the ribs or corrugations in the manner described provides' sand retaining grooves in the inner surfaces of the flask sections and the flanges 17 and 18 serve to further retain the sand in the flask when once the mold is formed.

A number of advantages are to be found in such a flask wall construction in that grooving or corrugating and flanging the wall in the manner described permits the use of steel plating which may be comparatively thin in cross section whereby I ob tain a light, yet rigid and durable flask. This comparative thinness in cross section simplifies the manufacturing process of forming the U-sections from steel plates and the positioning of the corrugations or ribs adjacent the top and bottom flanges of the flask affords a ready grip to the user or molder and prevents the accumulation of burs and sharp edges consequent to the characteristic rough treatment to which foundry flasks are subjected.

If desired, crane pins, hooks or handles may be secured to the flat portion of the walls in the manner illustrated in Fig. 1, where I show handle pins 19 provided with flat plate portion 19 riveted d rectly to the end walls of the flask intermediate the top and bottom corrugations or ribs 15 and 16 respectively.

I am aware of the fact that steel f'oundrv flasks having corrugated side walls are well known in the art, but the particular disposition of the corrugations or ribs formed in the side walls relative to inwardly extending flanges whereby the foregoing advan- U-shaped members having the ends thereof disposed in abutting relation and the top and bottom margins thereof provided with a single corrugation to form an outwardly extending reinforcing rib and inwardly extending flange whereby sand retaining grooves are provided around the top and bottom margins of the flask. I

2. A snap flask of rectangular shape formed of pressed steel to provide inwardly extending top and bottom sand retaining flanges and sand retaining grooves formed inthe wall adjacent the flanges whereby outwardly extending corrugations or ribs are formed into which the flanges extend and merge. V

3. A steel flask having an inwardly extending and retaining flange and an outwardly extending rib formed in the wall of the flask, immediately adjacent the flange, the flange wall extending into the wall rib and projecting inwardly beyond the wall.

4. A molders flask comprising U-shaped members having the ends thereof disposed in abutting relation and the top and bottom margins thereof corrugated. to form an outwardly extending rib and inwardly extending flanges, gusset plates overlapping the abutting ends of the U-shaped members, and snap pin brackets having flat portions corresponding to said gussets and secured to the gussets by rivets extending through the abutting ends of the U-shaped members.

5. In a snap flask, a flask member comprising a pair of flanged U-shaped members, the flanges thereof extending inwardly and having ribs formed adjacent the flanges, pin brackets disposed on the outside of the U- shaped members, and gussets disposed on the inside and means rigidly securing the abutting ends of said U-shaped members.

In testimony whereof, I hereunto affix my signature.

JOHN A. SHANAFELT. 

